Apparatus and method for torsional and lateral centralizing of a riser
US6260625A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/004
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A centralizing device is provided for a riser of an offshore well platform having an opening through which the riser passes from the platform to a subsea wellhead. The riser has generally planar fins extending radially outward from its outer diameter. The centralizing device has a frame which is mounted to the platform about the riser. A plurality of centralizing rollers are mounted to the frame and are radially extensible relative to the riser. The centralizing rollers bear against the riser and retain it laterally. A plurality of torsional rollers are mounted to the frame and are extensible towards the fins. The torsional rollers bear against the fins and retain the riser torsionally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.